900000025 has 24 divisors (see below), whose sum is σ = 1150741080. Its totient is φ = 697743360.

The previous prime is 900000011. The next prime is 900000041. The reversal of 900000025 is 520000009.

900000025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 576144009 + 323856016 = 24003^2 + 17996^2 .

It is a de Polignac number, because none of the positive numbers 2^k-900000025 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 899999954 and 900000008.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247017 + ... + 250633.

It is an arithmetic number, because the mean of its divisors is an integer number (47947545).

Almost surely, 2^900000025 is an apocalyptic number.

It is an amenable number.

900000025 is a deficient number, since it is larger than the sum of its proper divisors (250741055).

900000025 is a wasteful number, since it uses less digits than its factorization.

900000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3928 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 900000025 is about 30000.0004166667. Note that the first 3 decimals coincide. The cubic root of 900000025 is about 965.4893935453.

Subtracting from 900000025 its sum of digits (16), we obtain a palindrome (900000009).

It can be divided in two parts, 9000000 and 25, that multiplied together give a square (225000000 = 15000²).

The spelling of 900000025 in words is "nine hundred million, twenty-five", and thus it is an aban number.